Tag Archives: impacts

Asteroids from a martian mega-impact?

Posted on April 9, 2018 by rburnham

Like evidence left at a crime scene, the mineral olivine may be the clue that helps scientists piece together Mars’s possibly violent history. Could a long-ago giant impact have flung pieces of Mars throughout our inner solar system? Two researchers … Continue reading →

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THEMIS: A peppering of small craters

Posted on April 4, 2018 by rburnham

THEMIS Image of the Day, April 4, 2018. This field of small dark craters is located in southern Elysium Planitia. The dark appearance against the surrounding lava flows suggests that the craters post-date the lava flows. The small “tails” near … Continue reading →

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THEMIS: Yuty Crater ejecta

Posted on March 26, 2018 by rburnham

THEMIS Image of the Day, March 26, 2018. Off the image to the right is Yuty Crater, located between Simud and Tiu Valles. The crater ejcta forms the large lobes along the right side of this VIS image. This type … Continue reading →

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HiRISE: Crater rim layers, rubble, and gullies

Posted on August 10, 2017 by rburnham

This is a close view of the rim and upper wall of an impact crater on the Martian surface. The layers in enhanced color are exposed subsurface strata that are relatively resistant to erosion. Boulder-like rubble beyond the crater rim … Continue reading →

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HiRISE: Mojave Crater far-flung impact ejecta

Posted on June 27, 2017 by rburnham

Distal reaches of Mojave Crater impact ejecta. Beautiful Mars series.

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HiRISE: Layers on rim of southern impact crater

Posted on June 19, 2017 by rburnham

Swoop! – Layers on the rim of an impact crater in the southern region of Mars. Beautiful Mars series.

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HiRISE: Small, fresh, and martian

Posted on June 8, 2017 by rburnham

Small, fresh, and martian – By “fresh,” (and sometimes “recent”), we are talking in geological terms only. Beautiful Mars series.

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HiRISE: South polar pit or an impact crater?

Posted on May 30, 2017 by rburnham

It is late summer in the Southern hemisphere, so the Sun is low in the sky and subtle topography is accentuated in orbital images. We see many shallow pits in the bright residual cap of carbon dioxide ice (also called … Continue reading →

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Tornado-like winds from impacts scoured surface

Posted on May 18, 2017 by rburnham

Plumes of vapor generated by ancient impacts on Mars created tornado-like winds possibly swirling at more than 500 miles per hour, which explain mysterious streaks seen near large impact craters on the Martian surface. In looking at NASA images of … Continue reading →

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THEMIS: Rough rim on Horowitz Crater

Posted on May 4, 2017 by rburnham

THEMIS Image of the Day, May 4, 2017. Today’s false color image shows part of the northern rim of Horowitz Crater, which is located in Terra Cimmeria. The THEMIS VIS camera contains 5 filters. The data from different filters can … Continue reading →

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